Fabricated multi-stage fortification anti-seismic stop block suitable for inclined bent bridge

Abstract

The utility model relates to the field of bridge anti-seismic check blocks, in particular to an assembly type multi-stage fortification anti-seismic check block suitable for an inclined bent bridge. According to a traditional check block, the displacement of a main beam can be coupled with translation and rotation in an earthquake, so that non-vertical collision possibly occurs between the main beam and the check block, the situation that the check block is locally stressed possibly occurs, and the check block is easier to damage. An assembly type multistage fortification anti-seismic stop block suitable for an inclined bent bridge comprises a U-shaped plate, and a plurality of bolt holes are formed in the left side and the right side of the U-shaped plate; the back clamping block is connected with the U-shaped plate into a whole; the rotating shaft is connected with the back clamping block; the anti-collision device can adaptively bear collision of main beams in different directions under the action of earthquakes, is suitable for the situation that non-transverse-bridge-direction displacement possibly occurs in an inclined bent bridge and the like, in addition, local damage to the check blocks and the main beams can be reduced, the energy consumption level of the check blocks can be improved, and meanwhile the check blocks are easy to install and rapid to replace.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge seismic fender field especially applicable to the assembly type multistage prevention seismic fender of skew bridge. BACKGROUND

[0002] Bridge is an important hub of traffic transportation, and it is of great significance to keep the bridge structure intact without being damaged under the action of earthquake. Therefore, it is necessary to reasonably design the bridge for seismic resistance to ensure that the bridge structure is not damaged or the corresponding structural damage is reduced under the action of earthquake.

[0003] The fender placed on the top of the pier cap beam is an important component for bridge seismic resistance, which can limit the transverse displacement of the main beam and prevent the main beam from falling off under the action of earthquake. The conventional fender is mostly a solid reinforced concrete block with rectangular or trapezoidal cross section. For skew bridges, the displacement of the main beam under earthquake will couple translation and rotation, which may cause non-vertical collision between the main beam and the fender, so that the fender may present local stress condition and the fender is more likely to be damaged. In addition, the conventional concrete fender is poured as a whole with the cap beam. When the fender and the main beam collide, not only the structure of the fender is damaged, but also the fender transmits a large impact force to the lower structure to cause corresponding damage. Moreover, for different degrees of earthquake action, the traditional fender is damaged in the form of steel-concrete structure to absorb energy, and the energy dissipation form of the structure is single and the damage mode is uncontrollable.

[0004] For the non-transverse displacement of skew bridges under the action of earthquake, multistage prevention should be taken for different degrees of earthquake action, and the traditional fender does not have corresponding design for this problem. Therefore, it is necessary to optimize the design of the seismic fender to make it comprehensive and efficient in performance. SUMMARY

[0005] In view of the shortcomings or deficiencies of the traditional fender, the utility model provides an assembly type multistage prevention seismic fender applicable to skew bridges, which can effectively withstand and consume the collision from the non-main beam direction and is applicable to skew bridges. For different degrees of earthquake action, different parts of the component are correspondingly consumed, which plays a multistage prevention effect and makes the fender more efficient. The buffer and energy dissipation device of the fender itself can reduce the local damage of the fender and the main beam. In addition, the fender is a steel fender of assembly type, which is convenient to install and replace and is conducive to the repair after damage.

[0006] An assembly type multistage prevention seismic fender applicable to skew bridges, characterized in that it comprises:

[0007] A U-shaped plate having a plurality of bolt holes on the left and right sides;

[0008] A back clamping block connected with the U-shaped plate as a whole;

[0009] pivot, connected with the back clamp block;

[0010] spring, provided with multiple, connected with the back clamp block;

[0011] front clamp block, connected with the pivot, the spring and the pivot;

[0012] bolt, connected with the back clamp block and the front clamp block;

[0013] cover beam, connected with the back clamp block and the front clamp block through the bolt.

[0014] Further, the back clamp block is connected with the U-shaped plate as a whole, and the front clamp block is connected with the back clamp block only through the pivot and the spring, without directly contacting the U-shaped plate.

[0015] Further, the back surface of the back clamp block is a whole plane with the U-shaped plate, and the plane and the outer surfaces of the left and right plates of the U-shaped plate are provided with horizontal and vertical stiffening ribs to improve the overall bending stiffness.

[0016] Further, it further comprises:

[0017] mild steel, provided with multiple, arranged on the front surface of the front clamp block.

[0018] Further, it further comprises:

[0019] gasket, arranged on the inner surfaces of the front clamp block and the back clamp block, used for positioning and installing the spring.

[0020] Further, the diameters of the multiple springs are equal, and the lengths are determined by the distance between the two gaskets.

[0021] The utility model has the advantages that compared with the traditional blocking piece, the utility model is clear in stress and comprehensive in performance. The U-shaped plate, the front clamping piece and the back clamping piece are steel structures and have small rigidity. The front clamping piece of the blocking piece is provided with soft steel, which can dissipate seismic energy through collision deformation under the action of rare earthquake, limit the transverse displacement of the main beam and prevent beam falling. For non-vertical collision prone to occur in the skew bridge, the rotating device composed of the clamping piece, the rotating shaft and the spring can rotate with the impact force, effectively buffer the collision, increase the sticking area of the blocking piece and the main beam in this case and make more soft steel deform to absorb the impact force. Under the action of frequency domain earthquake, the spring between the clamping plates is elastically contracted to absorb energy, and the blocking piece structure is not damaged. Under the action of relative design earthquake, the large impact force makes the soft steel deform and the other part of the blocking piece structure is not damaged. Under the action of rare earthquake, the huge impact force further damages the steel clamping piece and the rotating shaft in the case of soft steel deformation. The structure is graded in energy dissipation under different degrees of earthquake, reduces the local damage of the blocking piece and makes the damage mode of the blocking piece controllable. The utility model adopts the bolt assembly type mounting method of connecting the blocking piece to the bent cap, which is convenient for later maintenance and replacement. After the action of earthquake, the restoring force of the spring can push the main beam to reset, reduce the residual deformation of the main beam after earthquake and reduce the difficulty of bridge repair. The utility model has the advantages of clear structure, clear stress, comprehensive performance, economic cost, assembly, easy repair and the like and can be widely used. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of the assembly type multistage fortification anti-seismic blocking piece suitable for the skew bridge according to the utility model embodiment.

[0023] Figure 2 It is a top view of the assembly type multistage fortification anti-seismic blocking piece suitable for the skew bridge according to the utility model embodiment.

[0024] Figure 3 It is a side view of the assembly type multistage fortification anti-seismic blocking piece suitable for the skew bridge according to the utility model embodiment.

[0025] Figure 4 It is a connection diagram of the assembly type multistage fortification anti-seismic blocking piece suitable for the skew bridge and the main beam bent cap according to the utility model embodiment.

[0026] Figure 5 It is a local enlarged view of the bolt of the assembly type multistage fortification anti-seismic blocking piece suitable for the skew bridge according to the utility model embodiment.

[0027] Wherein, the above drawings include the following signs: 1-U-shaped plate, 2-front clamping piece, 3-back clamping piece, 4-rotating shaft, 5-spring, 6-soft steel, 7-stiffening rib, 8-bolt, 9-gasket, 10-main beam, 11- support, 12-bent cap. DETAILED DESCRIPTION

[0028] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets, welding and sticking in the prior art, which will not be described in detail here.

[0029] Example 1

[0030] A kind of assembled multistage fortification anti-seismic block suitable for skew bridge, as shown in Figures 1-5 The bridge assembled resettable energy dissipation anti-seismic block, characterized in that, comprising:

[0031] U-shaped plate 1, multiple bolt holes are opened on the left and right sides thereof;

[0032] Back clamping block 3 is integrated with the U-shaped plate 1;

[0033] Pivot 4 is connected with the back clamping block 3;

[0034] Multiple springs 5 are provided and connected with the back clamping block 3;

[0035] Front clamping block 2 is connected with the pivot 4, the springs 5 and the pivot 4;

[0036] Bolt 8 is connected with the back clamping block 3 and the front clamping block 2;

[0037] Strut 12 is connected with the back clamping block 3 and the front clamping block 2 through the bolt 8.

[0038] The back clamping block 3 is integrated with the U-shaped plate 1, and the front clamping block 2 is connected with the back clamping block 3 only through the pivot 4 and the springs 5, without directly contacting the U-shaped plate 1.

[0039] The back surface of the back clamping block 3 and the U-shaped plate 1 are an integral plane, and the plane and the outer surfaces of the left and right plates of the U-shaped plate 1 are provided with horizontal and vertical stiffening ribs 7 to improve the overall bending stiffness.

[0040] Further comprising: multiple soft steels 6, which are arranged on the front surface of the front clamping block 2.

[0041] Further comprising: gasket 9, which is arranged on the inner surfaces of the front clamping block 2 and the back clamping block 3, and is used for positioning and mounting the springs 5.

[0042] The diameters of the springs 5 are equal, and the lengths are determined by the distance between the gaskets 9 at both ends.

[0043] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An assembled multi-stage seismic resistance block suitable for skew bridge, characterized in that it comprises: a U-shaped plate (1) having a plurality of bolt holes on both sides; a back clamp (3) connected with the U-shaped plate (1) as a whole; a rotating shaft (4) connected with the back clamp (3); a plurality of springs (5) connected with the back clamp (3); a front clamp (2) connected with the rotating shaft (4) and a plurality of springs (5) through the rotating shaft (4); a bolt (8) connected with the back clamp (3) and the front clamp (2); a cap beam (12) connected with the back clamp (3) and the front clamp (2) through the bolt (8).

2. The multi-stage seismic fender block for skew bridge according to claim 1, characterized in that: The back clamp (3) is connected with the U-shaped plate (1) as a whole, and the front clamp (2) is connected with the back clamp (3) only through the rotating shaft (4) and the spring (5), without directly contacting the U-shaped plate (1).

3. The multi-stage seismic fender block for skew bridge according to claim 1, characterized in that, The back surface of the back clamp (3) is a whole plane with the U-shaped plate (1), and the plane and the outer surfaces of the left and right plates of the U-shaped plate (1) are provided with horizontal and vertical stiffening ribs (7) to improve the overall bending stiffness.

4. The multi-stage seismic fender block for skew bridge according to claim 1, wherein, Further comprising: a plurality of soft steels (6) arranged on the front surface of the front clamp (2).

5. The multi-stage seismic fender block for skew bridge according to claim 1, characterized in that, Further comprising: a gasket (9) arranged on the inner surfaces of the front clamp (2) and the back clamp (3) for positioning and installing the spring (5).

6. The multi-stage seismic fender block for skew bridge according to claim 5, wherein, The diameters of the plurality of springs (5) are equal, and the lengths are determined by the distance between the two end gaskets (9).

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